Winding device for punched strip stock



Sept..22, 1942. w. M. ANDERSON I 2,296,438

WINDING DEVICE FOR PUNCHED STRIP STOCK Filed Oct. 23, 1940 V sSheets-Sheeb 2 MAW Sept. 22, 1942. w. M. ANDERSON 2,

WINDING DEVICE FOR PUNCHED STRIP STOCK Filed Oct. 23, 1940 5 SheetS-Sheet 1 120622207 WFlliam M Anderson P 1.942- w. M. ANDERSON 2,296,488

WINDING DEVICEFOR PUNCHED STRIP STOCK Filed on. 23, 1940 :s Sheets-Sheets 121mm Z'or W122 am M Anderson Patented Sept. 22, 1942 WINDING DEVICEFOR PUNCHED' STRIP STOCK William M. Anderson, Minneapolis, Minn.,assignor to said Anderson and F. J. Kerner, both of Minneapolis, Minn.,a co-partnership Application October 23, 1940, Serial No. 362,374

1 Claim.

My present invention provides a simple and highly efficient device forthe winding of punched strip stock and, generally stated, consists ofthe novel devices, combinations of devices and arrangements of partshereinafter described and defined in the claim.

The term strip stock as usually referred to in the trade designates longribbon-like metal strips such as frequently employed in connection withpunch presses. These strip stocks or metallic ribbons are usually quitethin and quite flexible and generally come to the trade wound on reelsor large spools from which they are delivered to the punch press. Thesepunch presses usually have their own intermittently acting and properlytimed feed mechanism that feed the strip stock from the supply reel tothe punch mechanism.

My invention makes it practicable to rewind the punched strip or ribbononto a motor-driven receiving reel. In accomplishing this result,however, it is of very great importance that there be maintained acertain amount of slack in the ribbon between the punching mechanism andthe rewinding reel so that there will be no undue strains put upon thepunched ribbon. My invention provides extremely simple and highlyefficient means for accomplishing this result.

In the accompanying drawings my invention is illustrated in connectionwith a punch press of the self-feeding punch reciprocating type.

Referring to the drawings wherein like characters indicate like partsthroughout the several views:

Fig. 1 is a view in elevation illustrating the invention as applied toor in connection with a punch press of the type above just stated, someparts of the press being broken away;

Fig. 2 is a front elevation showing the di plate, punch mechanism, andfeed mechanism of the punch press, said parts being on a somewhat largerscale than in Fig. 1;

Fig. 3 is a fragmentary view in front elevation showing part of thepunch feeding mechanism on a somewhat larger scale than in Fig. 2;

Fig. 4 is a view in elevation, with some parts in section and some partsbroken away, showing the parts just at the right of the dotted linemarked 4-4 on Fig. l, the said parts being shown on a much larger scalethan in Fig. 1;

Fig. 5 is a view partly in diagram but with some parts in frontelevation;

Fig. 6 is a plan view, with some parts broken away, showing parts foundjust below the line marked 6-6 on Fig. l and showing the said parts on amuch larger scale than in Fig. 1;

Fig. 7 is a fragmentary view in elevation showing parts just at the leftof the dotted line marked 1-1 on Fig. 1;

Fig. 8 is a View corresponding to Fig. 5 but illustrating a modifiedarrangement; and

Fig. 9 is an enlarged section taken on the line 9-9 of Fig. 8, someparts being broken away.

The preferred arrangement illustrated in Figs. 1 to 7, inclusive, willfirst be referred to and described. The punch press illustrated is of awellknown type, and hence, the parts thereof may be briefly enumeratedas follows: The punch framework I2, the die plate l3, and thereciprocating punch plate I 4, which latter carries the customary punch15 and cam-acting feed lug l6. Mounted on the die plate I3 is a slide I!that is pressed forwardly by a. spring I8 and is provided with a rollerl9 which, when the die plate is depressed, is engaged by the cam lug l6and slide I1 is then pressed rearward or toward the right in respect toFigs. 2 and 3. On slide I! is a spring-pressed friction-acting feed dog20 and on the die plate I3 is a similar spring-pressed retaining dog 2|.The action of this feed mechanism is well-known and for the purpose ofthis case, it is only deemed necessary to state that when the slide I1is pressed rearward, dog 2| prevents the strip or ribbon y'from beingmoved rearward and when slide I1 is returned forward, under the actionof spring l8 after lug I6 and punch are lifted, feed dog 20 willfrictionally clamp the strip or ribbon to the slide and produce therequired or predetermined feed movement of the strip or ribbon. It maybe further stated that under the action of the feed mechanism justdescribed, rearward movement of the strip will be prevented and theproper feed movement of the ribbon will be produced, but .it will bepossible by the application of a forward pulling force to move theribbon through the feed mechanism and which movement would throw thetiming of the punching action out of action.

Under the action of the punch slots or holes y will be produced in thestrip y and the punched out portions will be dropped from the press. Insome instances the punched out portions will be waste and the punchedribbon will be a finished or partly finished article, but in otherinstances the punched out portions may be for the making of certainarticles and in which case the punched ribbon or strip will be waste. Ineither event the punched strip or ribbon must be taken care of and inaccordance with my invention, it is arranged to be wound upon areceiving reel. This reel, in the drawings, is indicated by the numeral22, is mounted on a support somewhat distant from the punch and ismotor-driven. This support can take various forms but, as shown, in thedrawings, it involves a floor-engaging anchor or base frame 23 providedwith an upstanding post 24 with an offset secondary post 25. The post24, at its upper end, has a bearing head 26 and to the upper end of thesecondary post is applied a box-like gear housing 21. The reel 22,through connections now to be described, is arranged to be driven at itsrelatively slow peed from a small electric motor 28, the casing of whichis shown as secured to the housing 21. I

The reduction mechanism here illustrated is of conventional type and, asshown, involves a spur pinion 29 on the rotor shaft of motor 28 andwhich pinion meshes with a spur gear 30 on a short shaft 3| journaled inthe housing 2'! and a bearing 32 'of the housing. Within the housing 27shaft 3| has a worm 33 that meshes with a worm gear 34 on a shaft 35also journaled in bearings of housing 21. Shaft 35 has a worm 36 thatmeshes with a worm gear 3! carried. by a shaft 38 journaled in bearingson the housing and projecting therefrom. At its outer end shaft 38, byuniversal joint 39, is connected to a reelcarrying shaft 48 jcurnaled inthe head 26. Reel threaded on the projecting end of the shaft 48.

By the action of spring 43, the reel will be frictionally coupled toshaft '40 so that it will be rotated at a relatively low speed from themotor through the reduction mechanism described or any other suitablereduction mechanism.

Located midway between the press and receiving reel is a contactsupporting post which may be and, as shown, is supported from an arm 46projected from the post 24. This contact sup porting post 45, at itslower portion, is provided with a laterally projecting contact pin orelement 4'! that is insulated from said post 45 by insulating material48, see particularly Fig. '7.

At a point considerably above the contact pin- 41 is a second contact49, see particularly Figs. 5 and '7. This contact 49 is pivoted on a pinor projection 58, see particularly Figs. 5, 6 and '7, that projects fromthe post 45 but is insulated therefrom by insulating material 5 I. c Thepinsor elements 47 and 59, as shown, are directly connected tosleeve-like heads 52 and 53, respectively, which, as shown, are rigidlybut'adjustably secured on post 45 by set-screws 52 and 53. Pivoted uppercontact 49 is shown as provided with a small counter-weight 49' which islittle less in weight but sufiicient to overcome the weight of theradial projecting portion of said contact 49.

In this preferred arrangement the metallic stock strip or ribbon is usedas a part of the electrical control circuit, and hence, a sort of awiper-acting contact or friction device is arthe press on its way to thereel 22, is passed between the lower and upper contacts 4'! and 49 andbetween the spring prongs of wiper-acting contact 54. Here it may bestated that the frictional clamping action between the prongs 54 and thepunched stock strip is only sufficient to maintain good electricalcontact and to put a light tension on the strip stock as it is beingwound on the reel.

Also, it may be here stated that the tension of spring 43 will be set sothat it is sufiicient to cause the reel 22 to rotate with motor-drivenshaft 49, but will not be sufiicient to cause breaking of the punchedstock strip y if anything should happen to stop the punching machinewhile the motor-driven receiving reel is still in action.

The reel-actuating motor 28 is in a supply circuit 58 that is connectedacross the main or supply line 59. In the motor circuit 58 is acontrolling switch 60, see particularly Fig. 5. Motor switch 68 arrangedto be opened and closed at the proper times, hereinafter specified, by adifferential relay which involves tandem arranged solenoids 6| and 62and a reciprocating core 63. Both solenoids or coils 6| and 62, at oneend, are connected to a battery 64, one side of which is grounded at 65.The other sides or ends of solenoids 6i and 52 are connected,respectively, by wires Ela and 62a to the heretofore noted contacts 47and 49. The so-called wiper contact 5455 is grounded through a wire orconductor 66, as shown in Fig. 5. c

In Fig. 4 the numeral 61 indicates a casing secured to the base of post25 and in which the battery 64 is adapted to be contained.

Operation of structure illustrated in Figs. 1+7, inclusive In startingthe winding mechanism into action, the punched metal strip y will, asalready stated, be passed below the upper contact 49 and above the lowercontact 41. When the strip 1/ does not engage either of the saidcontacts 4749, the circuit to reel-actuating motor 28 will beopened and,of course, the receiving reel will not then be rotated. When the pressis operated so as to produce enough slack to permit the strip y toengage lower contact 41, solenoid or coil 6| will be energized causingthe core 63 to close motor switch 60, thereby starting the motor andactuating the reel 22 to wind thereon the punched strip and take upslack thereof. This condition is shown by full lines in Fig. 5.

At the time just stated current from battery 64 will be through coil 6|,through wire 61a to. contact 41, from contact 41 through a portion of"punched metallic strip 1 to contact 5455, and from thence from groundand back to battery. This operation of winding up the punched strip onthe receiving reel will continue until the slack in the strip has beentaken up substantially as shown by dotted lines in Fig. 5, andthereupon, coil 62 will be energized causing motor switch to be openedand the receiving reel stopped. At the time just now noted the flow ofcurrent from battery 64 will be through coil 62, wire 62a to uppercontact 49, and from thence through a portion of the strip y to contact54-55 and to ground and back to battery 64. When coil 62 is energized,core 63 will be retracted, thereby opening the motor switch 60, as juststated. Oficours'e, the arm 56,

which is preferably metal, could be grounded from the post 45, but thatis n'ot'necessary since the controlling contacts 41-49 are insulated onefrom the other and from the metallic parts of the machine.

In Figs, 8 and 9 I have illustrated a somewhat modified arrangement inwhich the lower contact, corresponding largely to the contact 41, 1semployed, and in which structure the reel-actuating motor willpreferably be provided with a flywheel that would cause the motor andreceiving reel to be rotated by momentum for a short interval after themotor circuit has been broken. In this modified structure some of theparts are identical with those illustrated in connection with Figs. 1 to7, inclusive, and hence, these very similar parts are indicated by thesame numerals with the exponent a added thereto.

In this modified structure the lower strip-engaging contact 68 is shownas of the brush type and is supported by and insulated from the post45a. The motor circuit switch 60a in this arrangement is subject to asolenoid or magnet 69, one side of which is grounded through battery 64aand the other side of which is connected by a wire to contact 68. Alsoin this structure wiper contact 54a55a is grounded through wire 66a. Thereel-actuating motor 28a, which is in the circuit 58a, is shown asprovided on its rotor shaft with a small flywheel 58b.

Operation of Figs. 8 and 9 From the foregoing the operation of thestructure of Figs. 8 and 9 is probably obvious, but may be brieflystated as follows:

When the slack in strip 1 is such as to cause it to drop into engagementwith brush contact 68, magnet 69 will be energized thereby closingswitch 6011, thereby starting the motor 58a into action to operate thereceiving reel. As soon as strip y is raised from contact 68, thebattery circuit through coil 69 will be broken causing switch 68 to openand thereby cutting off the current to motor 28a. After the current iscut off from motor 2811., the motor under momentum will operate thereceiving reel so as to continue the winding action to a considerableextent but not enough to take all of the slack out of the strip y.

From the foregoing it will be understood that while I have illustratedseveral embodiments of my invention that the same is capable of variousother modifications or changes all within the scope of the inventionherein broadly claimed.

What I claim is:

The combination with means for feeding a ribbon-like metal strip, and areceiving reel r0 tatively mounted at a point distant tlierefrorri andpositioned to receive the strip, of an electric motor with connectionsfor rotating said reel, a supply circuit for said motor including aportion of said metallic strip and a master switch, a two-coileddifferentially acting magnet for operating said master switch, asupporting post, a lower or cutin electrical contact adjustably mountedon but insulated from said post, an upper or cut-out electrical contactadjustably mounted on but insulated from said post, an arm pivoted tosaid post below said metallic strip, a wiper contact carried by the freeend of said pivoted arm and maintaining contact with said metallic stripat a point distant from said post, and a divided electric circuit, onebranch of which includes one coil of said electro-magnet, said cut-incontact and said wiper contact, the other branch of which circuitincludes the other coil of said electro-magnet, said cut-out contact andsaid wiper contact, the arrangement of said elements being such that thecircuit to the first noted coil of said electro-magnet will be closedwhen, and only when, said metallic strip is engaged with said cut-incontact, and the circuit through the other coil of said electro-magnetwill be closed when, and only when, said metallic strip is engaged withsaid cut-out contact,

W LIAM M- A D S N.-

